CN202926247U - Long-tail-pipe casing-corrosion-preventing sucker rod string - Google Patents
Long-tail-pipe casing-corrosion-preventing sucker rod string Download PDFInfo
- Publication number
- CN202926247U CN202926247U CN 201220650014 CN201220650014U CN202926247U CN 202926247 U CN202926247 U CN 202926247U CN 201220650014 CN201220650014 CN 201220650014 CN 201220650014 U CN201220650014 U CN 201220650014U CN 202926247 U CN202926247 U CN 202926247U
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- CN
- China
- Prior art keywords
- oil
- casing
- well pump
- pipe
- tail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a long-tail-pipe casing-corrosion-preventing sucker rod string. A pump-mounted oil pipe and an oil well pump are connected and then are lowered into a casing. An oil layer is communicated with the casing. The oil well pump is below a working fluid level. A lengthened tail pipe is connected below the oil well pump. An oil well pump suction inlet is installed below the lengthened tail pipe and is below the oil layer. Water-containing well fluid flows into the casing from the oil layer, then flows downwards to the oil well pump suction inlet and finally is pumped out by the oil well pump. When the water-containing well fluid flows downwards, oil-water separation is realized, the casing from the oil layer to the working fluid level is filled with crude oil, the casing is prevented from being corroded and the goal of preventing the casing from being corroded is achieved. Therefore, the long-tail-pipe casing-corrosion-preventing sucker rod string has the advantages that the service life of the casing can be prolonged, the oil field development benefits are improved and the economic benefits are remarkable.
Description
Technical field
The utility model is the flow string that petroleum industry is used, and is the anti-casing corrosion pumping pipe string of a kind of long-tail pipe.
Background technology
Present pumping pipe string be generally with the oil pumping pump intake on oil reservoir, during oil pumping, well liquid flow in sleeve pipe from the stratum, more upwards to moving, flows in oil well pump through the oil pumping pump intake.Well liquid is in flowing to this section of oil pumping pump intake distance, the well liquid that flows will contact with internal surface of sleeve pipe, owing to containing certain water yield in well liquid, be dissolved with the corrosivity mineral in water, can produce corrosion to this section sleeve pipe that flows through, affect oil field development production the application life of reentrant bushing, makes the oil field produce heavy economic losses.
Summary of the invention
The purpose of this utility model is the anti-casing corrosion pumping pipe string of a kind of long-tail pipe of design, reduces the contact length that contains well liquid and sleeve pipe that flows, and prevents casing corrosion.
The purpose of this utility model is achieved in that oil pipe on pump, oil well pump are lowered in sleeve pipe after connecting, oil reservoir communicates with sleeve pipe, and oil well pump is under producing fluid level, connects under oil well pump to lengthen tail pipe, lengthen the oil well pump intake is installed under tail pipe, the oil well pump intake is under oil reservoir.
The beneficial effects of the utility model are: contain well liquid and flow to from oil reservoir and flow to oil well pump under backward in sleeve pipe and suck eloquence and extracted out by oil well pump, when containing well liquid and flowing downward, can produce water-oil separating, oil reservoir has been full of crude oil to this section of producing fluid level sleeve pipe, this section sleeve pipe can be corroded, thereby reaches the purpose that prevents casing corrosion, therefore, the utility model can extend the application life of sleeve pipe, improves the oil field development benefit, has significant economic benefit.
Description of drawings
Fig. 1 is the tubing string schematic diagram of the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
As shown in the figure, on pump, oil pipe 2, oil well pump 3 are lowered in sleeve pipe 1 after connecting, and oil reservoir 5 communicates with sleeve pipe 1, oil well pump 3 is under producing fluid level 6, connect lengthening tail pipe 4 under oil well pump 3, lengthen oil well pump intake 7 is installed under tail pipe 4, oil well pump intake 7 is under oil reservoir 5.
Containing well liquid flows to sleeve pipe 1 from oil reservoir 5 and can only flow to oil well pump intake 7 after interior downwards and enter and lengthen tail pipe 4, then extracted out by oil well pump, contact few when containing well liquid and flowing downward with sleeve pipe 1, and when flowing downward, can produce water-oil separating, make oil reservoir be full of crude oil to this section of producing fluid level sleeve pipe, the sleeve pipe that contacts with crude oil can not be corroded.
The utility model is particularly useful for the dark well of oil reservoir, because between the dark well oil reservoir of oil reservoir and oil well pump, distance is large, the length of protective casing is large, more remarkable effect.
Claims (1)
1. a long-tail pipe is prevented the casing corrosion pumping pipe string, oil pipe on pump (2), oil well pump (3) are lowered in sleeve pipe (1) after connecting, oil reservoir (5) communicates with sleeve pipe (1), oil well pump (3) is under producing fluid level (6), it is characterized in that: connect lengthening tail pipe (4) under oil well pump (3), lengthen oil well pump intake (7) is installed under tail pipe (4), oil well pump intake (7) is under oil reservoir (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220650014 CN202926247U (en) | 2012-12-02 | 2012-12-02 | Long-tail-pipe casing-corrosion-preventing sucker rod string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220650014 CN202926247U (en) | 2012-12-02 | 2012-12-02 | Long-tail-pipe casing-corrosion-preventing sucker rod string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202926247U true CN202926247U (en) | 2013-05-08 |
Family
ID=48216220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220650014 Expired - Lifetime CN202926247U (en) | 2012-12-02 | 2012-12-02 | Long-tail-pipe casing-corrosion-preventing sucker rod string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202926247U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926677A (en) * | 2012-12-02 | 2013-02-13 | 中国石油化工股份有限公司 | Long-tail-pipe oil pumping pipe column for preventing corrosion of casing |
-
2012
- 2012-12-02 CN CN 201220650014 patent/CN202926247U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926677A (en) * | 2012-12-02 | 2013-02-13 | 中国石油化工股份有限公司 | Long-tail-pipe oil pumping pipe column for preventing corrosion of casing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |